ITT Goulds Pumps 3405, Инструкции по установке, эксплуатации и обслуживанию

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parting flange, especially around the casing wearing ring locks, or internal leakage from high to low
pressure zones in the pump may occur.
Lower carefully the entire rotating element into the lower half casing. Be sure that the wearing ring,
stuffing box bushing and bearing housing "locks" line up with the recesses in the lower half casing.
The single "lock" on each of these parts must be on top so that when the upper half casing and the
bearing caps, having only one recess each, are bolted in place, these parts are locked against rota-
tion.
With "locks" properly aligned, the rotating element should settle easily into place. If there is interfer-
ence, the impeller may have to be tapped along the shaft until it lines up correctly. The sleeves may
have to be backed off to do this.
After the element has been properly seated in the lower half casing, tap impeller along shaft until
the shoulders on the impeller are in the center of the space between the two casing wearing rings
(103). In other words, dimension "C" and "D"
Figure 21: Left hand pump on page 48 and Figure
22: Right hand pump on page 49 will be equal.
Now tighten shaft sleeve (104) against impeller until the marks which were made previously line up,
indicating that the keyways are in line. Check again the distance between the wearing rings and the
impeller shoulders. If rubbing occurs, turn the shaft sleeve (104) one complete turn ahead or back
as required.
With the locating marks together, tap the key (178) from the opposite end of impeller into the shaft
sleeve (104) until the end of the key is flush with the end of the impeller (on end opposite sleeve
104).
Tighten the shaft sleeve (126) securely against the impeller with a spanner or a strap wrench. Tight-
en set screw in sleeve (126) (if supplied - previous design did not have set screw). Be sure fiber
insert is under set screw so that set screw will not burr shaft.
Check the rotating elements for free turning by rotating slowly in one direction and then the other.
The casing wearing rings and the stuffing box bushings should be seated in the lower half casing,
and should remain stationary when the shaft is rotated. If they ride on the impeller or sleeves, it may
indicate that the bearing housings, wearing rings or bushing surfaces in the lower half casing have
not been properly cleaned of scale or other foreign matter, or that there is too much eccentricity in
the element, due to a bent shaft or other causes. If any of the above are evident, correct the cause
and continue to assemble as follows.
25. Replace shims (1/64" thick) over bearing cap studs.
26. Assemble bearing caps (111) and tighten the nuts evenly, being sure that the bearing caps are re-
placed on the same end from which they were removed.
27. Check again for free turning of the rotating element.
28. Place the parting gasket in position over the studs on the lower half casing with the edges flush with
the stuffing box bores and tight against the wearing rings and stuffing box bushings.
29. Be sure that the "locks" on the stuffing box bushing and wearing rings are in their correct position
with the single "lock" on top.
Lower carefully the upper half casing, which should settle into position without resistance and then
slip the dowel pins in place.
Check the rotating element for free turning and, if no binding is apparent, tighten casing parting nuts
alternately on each side of the pump starting from the center. The shaft should turn freely after all
nuts are tightened.
30. Repack stuffing boxes and replace gland assemblies as outlined in 3.3 Stuffing boxes on page 21 .
31. Check coupling alignment as outlined in Alignment - initial. If the direction of rotation has been
changed, see 7.6 Changing rotation of pump in field on page 54 .
32. Connect coupling as outlined in 2.9 Connection of coupling on page 18 .
33. Grease or oil pump bearings as outlined in 7.1 Lubrication - bearings on page 37 .
34. Connect auxiliary piping, if used.
7.5 Reassembly of pump
3405-3406-3416 Installation, Operation and Maintenance Instructions 53